Ship propulsion.



E. D. DICKNSON.

SHIP PHOPULSION.

APPLICATION HLED Nov. s, 19u.

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inventor: EdgarDDckmsow,

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EDGAR D. DICKINSON, OF SCHENECTADY, N EW YORK, ASSIGNOR TO GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

SHP PBOULSION.

Specication of Letters Patent.

application filed. Nvember s, 1917. l serial' No. 200,026.

To all whom t may concern Be it known that I EDGAR D. DrcKINsoN, a subject of the King of Gt. Britain, residing at Schenectady, in the county of Schenectady, State of New York, have invented which for the greater part of the time are operated at cruising speed, but at times are required to operate at higher or maximum speeds. y I, ,t

For a consideration of what l believe "to be novel and 'my invention, attention is l/directed to the `accoinpanying specification and the claims appended thereto. l

In the dra-wing, the iigureisa diagrammatic plan 1new of an installation embody#4 ing my invention. y

` Referring to the drawing, 1 indicates a propeller shaft, 2 a propeller, and 3 a gear wheel on the propeller shaft through which the shaft is driven.l Meshing with the gear Wheel 3 are two driving pmions 4 and 5 mounted on shafts 6 and 7. Connected to the shaft 6 is a high pressure turbine 8 and a cruising turbine 9, and connected to the f i turbines may be connected 1n ser1es.

shaft 'l' is a low pressure turbine 10. Elastic iiuid is conveyed to the turbine 8 by a conduit 11 provided with a suitable valve 12. A conduit 13 is also provided through which elastic Huid may be admitted directly to an intermediate stage of the turbine, thus bypassing the lr'rst stages. The purpose of this, as isi/Well understood, is to enable the machine to taire more elastic fluid thus increasing its power. 1n conduit 13 is a suitable valve 14. Elastic duid is admitted to the cruising turbine 9 b` a conduit 15 in which is a regulating valve 16. The exhaust end of the cruising turbine 9 is connected by aconduit 17 to the admission end of the high pressure turbine S smthat these tvvo n conduitl? is a. valve 18. The exhaust end of highl` pressure turbine 8 is connected by a conduit 19 to the admission end of low premiare turbine 10. Leadin from the casn ing of low pressure turbine `0 is anv exhaust bines thus operating in series.

conduit 20 which connects with a suitable condenser (not shown) in the well known manner. Extending across the casing of the cruising turbine 9 is a diaphragm 21 which forms a chamber' 22 in which is a reversing turbine element or wheel 23 to which elastic fluid may be fed by a conduit 21 provided with a suitable valve 25. Leading from chamber 22 is a conduit 26 which conveys the exhaust from the reversing element `23 to a reversing element 27 located in the exhaust end oi the casing of low pressure turbine 10. The elements 23 and 27 thus bear the relation to each other of high pressure and low pressure reversing elements respectively. 28 is a conduit leading from the cruising turbine casing to the condenser by means of which such casing can be connected to the condenser. In con-` and" 29 are closed and the valves 16 and 18 are open. Elastic fluid then tiows from conduit 15 through cruising turbine 9, conduit 17, high pressure turbine 8, conduit 19, and low pressure turbine 10 to the ex. haust' conduit 20, and thence to the condenser. The three Aturbines are thus connected in series and drive the propeller shaft in theforward direction through the two pinions 4 and 5 and gear wheel3.

1For higher speed loperation the valves 14, 16, l8fand 25 are closed and the valves 12 and 29 are opened. This then admits elastic fluid directly to Athe high pressure turbine 8 from which it flows ythrough the low pressure turbine 10 to the condenser, the two tur- Since the valve 29 is open, the casing of the cruising turbine is connected to the condenser, and hence its rotor runs idle in a vacuum equal to that of the condenser. The losses, there.

Patented J une 11, 1912..' 

